Resolve a subtle bug where we would never successfully be able to get

the first item in the CLI entry list.  This was preventing '!' from
showing up in either 'help' or in tab completion.

(closes issue #13578)
Reported by: mvanbaak


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@146198 65c4cc65-6c06-0410-ace0-fbb531ad65f3